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Palaeoenvironmental changes in the Holsteinian (MIS 11c) palaeolake at Ortel Królewski II (Eastern Poland) in the light of ostracod analysis

Wasążnik M.

Studia Quaternaria

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2018

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Vol. 35, Nr 2

91--102

EN

Lacustrine deposits from Ortel Królewski II (Eastern Poland) represent the Holsteinian Interglacial (MIS 11c). They are characterized by an extremely rich occurrence of ostracod and mollusc fauna. Collected samples represent pre-optimal part of the Holsteinian Interglacial corresponding to Picea–Alnus, Taxus and Pinus–Larix zones. Based on ostracod assemblage analysis a depth of the paleolake, the energy of the environment and the average January and July air temperature were reconstructed. Ostracods from Ortel Królewski II indicate a lake with possible periodic overflow surrounded by periodically flooded grasslands, which existed in the study area during the pre-optimal part of Holsteinian Interglacial.

2

Holocene lake and shallow water sediments at mograt Island, Sudan

Dittrich A., Neogi S.

Studia Quaternaria

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2017

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Vol. 34, Nr 1

9--21

EN

This paper presents the results of stratigraphic excavation and soil studies carried out at Mograt Island, the largest of the Nilotic islands in Sudan. Due to its restricted insular environments, Holocene alluvial deposits were observed to be interlocked with archaeological remains of different periods, allowing for a combined chronostratigraphic approach to study both cultural and climatic events. To better understand the environmental context through soil components and pedological features at a microscopic scale, soil block samples were accordingly collected and studied by the application of soil micromorphology. This approach provides insights into the history of Nile terrace aggradation through the suspension of Nile sediment loads under stillwater conditions as well as of the periodical establishment of shallow water pools at the islands’ plateaus by the surface run-off from local rains. Since these patterns vary significantly from the present situation, they offer a key to the scenario in which specific early agricultural and animal herding practices evolved.

3

Late Glacial and Holocene molluscan assemblages in deposits filling palaeolakes in northern Poland

Alexandrowicz W P

Studia Quaternaria

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2013

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Vol. 30, Nr 1

5--17

EN

Late Glacial and Holocene carbonate lacustrine deposits developed as lacustrine chalk and calcareous gyttja are fairly widespread across northern Poland. They form fillings of palaeolakes which developed during the deglaciation. These formations are usually covered by peat. Rich and diversified malacofauna has been found in the aforementioned sediments. The profiles from 154 sites described and published by various authors were subjected to malacological analysis. In the whole material, 18 molluscan assemblages were distinguished, representing three types of habitats: terrestrial, of temporary water bodies, and of permanent water bodies. The composition and structure of these assemblages allows characterizing climate and differentiating habitats. The time-sequences of malacological assemblages provided possibility to define three types of malacological sequences. On the basis of these successions, a scheme of the lake water bodies evolution during Late Glacial and in northern Poland was elaborated.

4

Malakofauna późnoglacjalnych i holoceńskich węglanowych osadów jeziornych północnej Polski

Alexandrowicz W. P.

Geologia / Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie

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2007

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T. 33, z. 4

395-420

PL

Późnoglacjalne i holoceńskie węglanowe osady jeziorne rozwinięte jako kredy jeziorne i gytie wapienne są bardzo rozpowszechnione na obszarze północnej Polski. Stanowią one wypełnienia paleojezior, które tworzyły się w okresie deglacjacji ostatniego lądolodu. Utwory te są zazwyczaj przykryte torfami. W omawianych osadach została znaleziona bogata i urozmaicona malakofauna. Analizie malakologicznej zostały poddane profile pochodzące z 54 stanowisk opracowanych przez różnych autorów. W całym badanym materiale zostało wydzielonych 18 zespołów mięczaków reprezentujących trzy typy siedlisk: środowiska lądowe, środowiska okresowych zbiorników wodnych i środowiska stałych zbiorników wodnych. Skład i struktura tych zespołów pozwalają na scharakteryzowanie klimatu i zróżnicowania siedlisk. Następstwa asocjacji malakologicznych umożliwiły zdefiniowanie trzech typów sekwencji malakologicznych. Na podstawie tych sukcesji został opracowany schemat ewolucji zbiorników jeziornych w czasie późnego glacjału i holocenu na północy Polski.

EN

Late Glacial and Holocene mollusc-bearing deposits developed as lacustrine chalk and/or calcareous gyttja are widespread in Northern Poland. They fill up water bodies formed during the final stage of deglaciation. These sediments usually contains rich assemblages of molluscs. Calcareous lake deposits and it's malacofauna were described in detail by several authors in 54 localities. Eighteen communities of snails and bivalves have been distinguished. They are represents three types of environment: land, temporary water bodies and permanent water bodies (lakes). The composition and structure of malacocenoses reflect changes of the climate and differentiation of habitats. Three types of malacological sequences can be define. The scheme of evolution water bodies during the Late Glacial and Holocene in Northern Poland was elaborated based on successions of molluscan communities.